Metal corner-bead.



N. 5.0mm METAL CORNER BEAD.

APPLICATION FILED MAY 7, 1912.

Patented Jan. 16, I917.

I 6 IIIIIIIIIIII NORRIS ELMORE CLARK, 0F PLAINVILLE, CONNECTICUT.

METAL CORNER-READ.

Specification of Letters Patent.

Patented Jan. 16, 1917.

Application filed May 17, 1912. Serial No. 698,078.

To all whom it may concern.-

Be it known that I, NoRRIs ELMORE CLARK, a citizen of the United States,and resident of Plainville, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements in MetalCorner-Beads, of which the following is a specification.

My invention relates particularly to what are generally termed metalcorner beads.

The main object is to provide a rigid but light weight corner bead whichcan be manufactured at a low cost and which can be readily shipped anderected and will have great holding power.

In its preferred form the corner bead has a rounded edge portion withlateral channels on each side for the plaster, together with spaced lugsand flaring arms. When a more rigid construction is desired wires may beattached to the outer edges of the flaring arms and additional stiffnessmay be provided if desired in the edge of the bead rounded outer edgeand'provides a secure by a supplementary wire or rod.

The corner relatively narrow strip of metal by first cutting portions ofthe opposite edges to form a pair of arms, then bending the ends of thearms upward from the plane of the strip, then bending the bases of thearms downward from the plane of the strip so as to throw the endsdownward and outward, then the ends of the arms are folded against thebases of the arms and flared outwardly and the edges of the body of thebead are The stripcorrugated bent inward toward each other. ispreferably longitudinally along the center substantially at the sametime that the arms are first cut. This stiffens the strip andfacilitates feeding as well as assisting in the following formingoperations. The longitudinal side wires may be attached by tangs cutfrom the arms and curled outward around the wires after the arms havebeen bent nto their final position The construction and method ofmanufacture are such that the corner bead may be readily produced bymeans of an automatic press having a suitable set of cutters and diesand arranged to operate by successive steps so that the blank strip isfed in at one end and the completed bead is delivered at the other endthus merely requiring an attendant for watching the machine.

The machine and tools for forming the bead is manufactured from a thearms are bent up as at bead will be made the subject matterof anotherapplication.

Figure 1 is a plan view showing a strip of metal in the various steps ofmanufacture from the blank strip to the finished bead. Fig. 2, is a sideview of the same. Fig. 3, is an enlarged section on the plane of theline X of Fig. 1. Fig. 1, is an enlarged section on the plane of theline X Fig. 5, is an enlarged section on the plane of the line X Fig. 6,is an enlarged section on the plane of the line K. Fig. 7, is anenlarged section of the body of the bead without any supplementaryreinforcing wire or rod.

In order to more clearly understand the invention I will describe thefinished product first. 1 v f The outer edge of the body 1 is preferablycurved as shown in Figs. 1, 2, 6 and 7. The rear edges 2, 2 of the bodyof the bead are pressed together as shown in Figs. 6 and 7 so thatlateral channels are formed back of the shoulders 3, 3. This gives asmooth anchorage for the plaster. Projecting rearwardly from the bodyportion of the head are the lugs 4:, 4: and flaring outward from theselugs are the arms 5, 5 which are adapted to rest against the corners ofthe wall. Portions of these arms 6, 6 are folded against the lugs 41:,4; as shown. The lugs of a single pair are spaced apart laterally andare adapted to act as stops against the corner'post of the wall wherethe corner bead is to be used. While the shape of thebody and edge ofthe bead gives it great rigidity for the amount of metal employed, incases where additional lateral stifiness is desired I employlongitudinal rods or wires such as 7,7 which may be secured to the armsfor instance by means of tangs such as 8, 8. light in weight and yetrigid and affords openings through the sides of the bead back of thebody portion so that the plaster can be united from the two sides of theangle in back of the body of, the bead. When additional stiffness isrequired in the bead a supplementary wire or rod 9 may be used.

The corner bead is made from a strip of metal 10. Arms 11, 11 are cutfrom opposite edges by suitable dies. The center of the strip is alsocorrugated longitudinally as at 12 preferably adjacent the cut portions.

In the next step of the action, the ends of 13, 13 by suitable Thisconstruction is dies leaving the bases of the arms 14c, 14 and the edges15, 15 of the body portion in the plane of the original strip.

In the next step the central portion of the strip is corrugated moredeeply as at 16 and the side edges 17, 17 and the bases 18, 18 of thearms are bent downward carrying the ends 19, 19 of the arms alsodownward. The metal is given an outward and downward bend as at 20 tobring the parts into a better position for the following actions.

In the next step the arms are folded along the angles 21, 21 so thatparts of the arms 22, 22 are pressed against the bases of the arms andtheir outer ends 23, 23 are flared outwardly, r

In the next-step the edges of the body of the bead are bent inwardly asat 2% by the action of suitable lateral dies. In cutting the arms, dieshaving rounded corners are preferably used so as to produce a round out25. In the finished product this rounded portion connects the rear edgeof the body of the strip with the lug which carries one of the flaringarms. The use of this rounded corner is advantageous in that the metalis less likely to fracture at this point where the arms and lug areattached to the body of the bead. The base of each arm is made narroweras at 27 to facilitate bending and give greater strength to the lug.

In the next step the edges of the body are closed together as at 2, 2into a completed bead. This final closing together will produce thefinished arch or rounded edge of the bead. The rod or wire 9 may beinserted just before the edges 2, 2are closed together or run along withthe strip.

By this method of construction a corner bead having long attaching armsmay be made from a narrow strip of metal. As the body is made out of asmall amount of metal it is light in weight and inexpensive. The methodalso is susceptible of operation in an automatic machine which requiresbut little attention to operate. The advantages of this constructionwill be apparent to those skilled in the art.

What I claim is 1. A corner bead formed of a strip of metal and having arounded outer edge, spaced lugs projecting rearwardly from said roundedouter edge and bendable attaching arms out longitudinally from the edgeportions of the strip between the positioning Copies of this patent maybe obtained for five cents each, by addressing the lugs, each of saidarms being integrally united with a lug at one end and free from saidstrip for the rest of its length, said arms being folded back againstthe lugs and flaring outwardly therefrom to provide a corner receivingangle in rear of the said lugs, and the sides of the bead in rear of theouter edge thereof being indented to provide shoulders and lateralchannels.

2. A corner bead formed of a strip of metal and having a rounded outeredge and rearwardly projecting spaced lugs and arms out from the sidesof the strip and folded over against the lugs and flaring outwardly andleaving openings for the plaster, the sides of the bead being bentinward slightly in rear of the edges so as to form lateral channels'andlongitudinally extending side wires secured to the outer ends of thearms.

3. A corner bead formed of a strip of metal and having a rounded outeredge and rearwardly projecting spaced lugs and arms out from the sidesof the strip and folded over against the lugs and flaring outwardly andleaving openings for the plaster, the sides of the bead being bentinward slightly in rear of the edges so as to form lateral channels andlongitudinally extending side wires secured to the outer ends of thearms by means of tangs cut from the arms and curled around the wires.

4. A corner bead comprising a body portion and arms out outlongitudinally from the side of the body portion, said arms being bentbackward substantially at right angles to the front edge of the bodyportion and extending 011 divergent lines in rear of the body portion,and said arms being narrowed at their point of attachment to the bodyportion to facilitate bending of the same.

5. In a corner bead construction, a folded body having its centralportion formed to constitute an edge protecting member and havingprojecting side portions with small integral tangs punched therefromadjacent the rear edges thereof whereby other members may be secured tosaid parts by means of said tangs, the bending outward of said tangsleaving small holes in said parts suitable for the reception offastening nails.

. NORRIS ELMORE CLARK.

WVitnesses Mnnrr'r O. RYDER, MARSHALL P. RYDER.

Commissioner of Patents,

Washington, D. G.

